1. 1. Hrabovcová V, et al. Measuring and Modelling of Electrical Machines. Zilina: EDIS. 2009; 335. ISBN 978-80-8070-924-2.
2. 3. Gutten M. Analysis of short-circuit currents in electrical equipment. Zilina: EDIS. 2011; 103. ISBN 978-80-554-0433-2.
3. Finite Element Method for Designing and Analysis of the Transformer - A Retrospective.;Chitaliya,2013
4. 5. Heatcote MJ. The J & P Transformer Book 13th edition. Chennai: ELSEVIER, 2007; 989. ISBN 978-0-7506-8164-3.
5. Diagnostic of distribution transformers by SFRA method.;Gutten;Przeglad Elektrotechniczny,2007